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Fabspeed releases 135i/335i N54 downpipes - $695

Fabspeed has released their downpipes for the 135i and 335i N54 based vehicles. These downpipes eliminate the primary cats. The diameter of the pipes is 2.75 inches. Gains are about 25 whp with these pipes, 02 simulator included for no check engine lights.

The power gains going from 2.75 to 3 are minimal on a street car anyway. They look pretty good.

Yeah they are both necking down to 2.5" anyway. I know that supposedly someone with 3" gained 7-15whp over 2.5" pipes with FBO at 15ish psi. I think they were vs Race Land's or one of the crappier ones though with bad cuts/welds thogh.